Gin Gagamaru (我牙丸 吟 Gagamaru Gin?) is a contender of the Blue Lock Project, who currently plays as a goalkeeper for Germany's Bastard München.

Gagamaru was a forward who aspires to be the best in the world along with the others of Blue Lock. When first arriving at Blue Lock, he was a member of Team Z during First Selection. After Third Selection it was noted that Gagamaru has the body, natural reflexes and skills to be an ideal goalkeeper and has since played as one.